Assuming the radius of diatomic molecules is approximately 1.0 10-10 m, for what pressure will the mean free path in room-temperature (20C) nitrogen be 4.6 m?
The Boltzmann constant is 1.38 10-23 J/K, Avogadro's number is 6.02 1023 molecules/mole, and the ideal gas constant is R = 8.314 J/molK = 0.0821 L atm/mol K.
A) 4.9 10-8 atm
B) 6.9 10-8 atm
C) 1.5 10-7 atm
D) 2.2 10-7 atm
Question 2
What is the mean free path of a gas of randomly-moving hard spheres of radius 2.00 10-9 m when the density of spheres is 3.00 1019 per cubic meter?
A) 1.17 10-4 m
B) 4.00 10-9 m
C) 9.76 10-5 m
D) 1.88 10-3 m
E) 4.69 10-4 m